DE1918074U - MATT DISC FRAME FOR PHOTOGRAPHIC CAMERAS. - Google Patents
MATT DISC FRAME FOR PHOTOGRAPHIC CAMERAS.Info
- Publication number
- DE1918074U DE1918074U DEL39425U DEL0039425U DE1918074U DE 1918074 U DE1918074 U DE 1918074U DE L39425 U DEL39425 U DE L39425U DE L0039425 U DEL0039425 U DE L0039425U DE 1918074 U DE1918074 U DE 1918074U
- Authority
- DE
- Germany
- Prior art keywords
- screen frame
- ground glass
- adjustment
- focusing screen
- photographic cameras
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/18—Balustrades; Handrails
- E04F11/181—Balustrades
- E04F11/1851—Filling panels, e.g. concrete, sheet metal panels
- E04F11/1853—Glass panels
Description
München 5. April 1965Munich April 5, 1965
Iinhof, Mkolaus Karpf KG., Präzisions-Kamera-WerkeIinhof, Mkolaus Karpf KG., Precision Camera Works
MünchenMunich
Mattscheibenrahmen für fotografische KamerasFocus frame for photographic cameras
Wesentliche Voraussetzung für einen Mattscheibenrahmen ist, daß die Auflagefläche für die Mattscheibe genau in der richtigen Ebene liegt und daß sie genau senkrecht zur optischen Achse des Objektivs steht. Um dies zu erreichen, mußte bisher der Mattseheitoenrahmen sehr genau gearbeitet werden, was ihn erheblich verteuerte. ETtI. trotzdem auftretende kleine Abweichungen wurden durch Beilegen von dünnen Seheiben zwischen Mattscheibenrahmen und Mattscheibe ausgeglichen. Dies war umständlieh» Außerdem konnten die Beilagen beim Auswechseln einer Mattscheibe leient verloren gehen.An essential prerequisite for a focusing screen frame is that the contact surface for the focusing screen is exactly the right one Plane and that it is exactly perpendicular to the optical Axis of the lens. In order to achieve this, it was necessary so far the matte unit frames are worked very precisely what made it considerably more expensive. ETtI. small ones that occur anyway Deviations were made by inserting thin washers between Ground glass frame and ground glass balanced. This was awkward »In addition, the side dishes could be replaced when changing get lost on a screen.
Durch die Neuerung werden die genannten Nachteile behoben. Sie besteht darin, daß der Mattscheibenrahmen eine zur Justierung senkrecht zur Mattscheibenebene verstellbare Auflage für die Mattscheibe besitzt. Yorzugsweise sind vier Schrauben als Justier elemente vorgesehen. Je zwei Justierelemente können auf eine Leiste wirken, an welcher je eine Eandfläone der Matt-The mentioned disadvantages are eliminated by the innovation. It consists in the fact that the ground glass frame is an adjustment adjustable support for owns the screen. Preferably four screws are provided as adjustment elements. Two adjustment elements each can work a bar, on each of which an end surface of the matt
-2--2-
scheibe aufliegt. Die Schrauben können nach der Justierung gegen Verstellung gesichert sein.disc rests. The screws can be secured against adjustment after the adjustment.
In der Zeichnung ist ein Ausführungsbeispiel im Schnitt dargestellt. Die Mattscheibe 1 liegt mit ihrer mattierten fläche 1a an dem Mattscheibenrahmen 2 in bekannter Weise nur an zwei gegenüberliegenden Seiten, vorzugsweise den Schmalseiten des Formates, auf. Die Auflageflächen am Mattseheibenrahmen werden von je einer leiste 3 gebildet, die in entsprechenden an das Bildfenster angrenzenden Vertiefungen am Mattscheibenrahmen 2 angeordnet sind. Jede leiste 3 stützt sich an zwei im Mattscheibenrahmen 2 sitzenden Justierschrauben 4 ab. Je eine an der Rückseite des Mattscheibenrahmens 2 mit Schrauben 5 befestigte Haltefeder 6 drückt auf die Rüekflache der Mattscheibe 1 und hält deren mattierte fläche in Anlage an den Leisten 3.An exemplary embodiment is shown in section in the drawing. The ground glass 1 rests with its frosted surface 1 a on the ground glass frame 2 in a known manner only on two opposite sides, preferably the narrow sides of the format. The contact surfaces on the focusing screen frame are each formed by a strip 3, which are arranged in corresponding depressions on the focusing screen frame 2 adjacent to the picture window. Each bar 3 is supported on two adjusting screws 4 located in the ground glass frame 2. One retaining spring 6 each fastened to the rear of the ground glass screen frame 2 with screws 5 presses on the back surface of the ground glass screen 1 and holds its frosted surface in contact with the strips 3.
Jede der beiden -^eisten 3 könnte auch in zwei Teile unterteilt sein, so daß jede Justierschraube 4 einer getrennten Leiste zugeordnet wäre.Each of the two - ^ eisten 3 could also be divided into two parts be, so that each adjusting screw 4 is a separate Would be assigned to the bar.
Es ist offensichtlich, daß bei dieser Anordnung die Mattscheibe 1 mit Hilfe der Justierschrauben 4 auf sehr einfache Weise genau in die richtige Lage gebracht werden kann. lach erfolgter Justierung können die Justierschrauben 4 mit üblichen Mitteln, z.B. Lack, gesichert werden.It is obvious that with this arrangement the ground glass 1 can be brought into the correct position in a very simple manner with the aid of the adjusting screws 4. laugh done Adjustment, the adjusting screws 4 can be secured with conventional means, e.g. paint.
Claims (5)
zur Justierung senkrecht zur Mattseheibenebene verstellbare Auflage für die Mattscheibe (1) besitzt.1. screen frame characterized in that it has a
has adjustable support for the ground glass (1) for adjustment perpendicular to the plane of the ground glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL39425U DE1918074U (en) | 1965-04-13 | 1965-04-13 | MATT DISC FRAME FOR PHOTOGRAPHIC CAMERAS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL39425U DE1918074U (en) | 1965-04-13 | 1965-04-13 | MATT DISC FRAME FOR PHOTOGRAPHIC CAMERAS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1918074U true DE1918074U (en) | 1965-06-16 |
Family
ID=33355007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL39425U Expired DE1918074U (en) | 1965-04-13 | 1965-04-13 | MATT DISC FRAME FOR PHOTOGRAPHIC CAMERAS. |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1918074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826310B4 (en) * | 1997-06-13 | 2005-07-28 | Pentax Corp. | Device for adjusting a focusing plate |
-
1965
- 1965-04-13 DE DEL39425U patent/DE1918074U/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826310B4 (en) * | 1997-06-13 | 2005-07-28 | Pentax Corp. | Device for adjusting a focusing plate |
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